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Consistently handle negative shifted macro args (#2014)

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Negative macro arguments count from the end, i.e. `\<-1>`
is equivalent to `\<_NARG>`, even after `shift`ing them.

Negative arguments cannot be used to access shifted values.
This commit is contained in:
Rangi
2026-07-07 02:19:37 -04:00
committed by GitHub
parent f82b0838a1
commit 21682e8814
5 changed files with 72 additions and 10 deletions
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test/asm/negative-shifted-macro-args.err
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error: Macro argument `\<999>` not defined
at negative-shifted-macro-args.asm::test(5) <- negative-shifted-macro-args.asm(22)
error: Macro argument `\<-999>` not defined
at negative-shifted-macro-args.asm::test(6) <- negative-shifted-macro-args.asm(22)
error: Macro argument `\<8>` not defined
at negative-shifted-macro-args.asm::test(10) <- negative-shifted-macro-args.asm(22)
error: Macro argument `\<-8>` not defined
at negative-shifted-macro-args.asm::test(11) <- negative-shifted-macro-args.asm(22)
error: Macro argument `\<-999>` not defined
at negative-shifted-macro-args.asm::test(12) <- negative-shifted-macro-args.asm(22)
error: Macro argument `\1` not defined
at negative-shifted-macro-args.asm::test(15) <- negative-shifted-macro-args.asm(22)
error: Macro argument `\<-1>` not defined
at negative-shifted-macro-args.asm::test(16) <- negative-shifted-macro-args.asm(22)
error: Number in bracketed macro argument is too large
at negative-shifted-macro-args.asm::test(19) <- negative-shifted-macro-args.asm(22)
error: syntax error, unexpected >
at negative-shifted-macro-args.asm::test(19) <- negative-shifted-macro-args.asm(22)
Assembly aborted with 9 errors